# A023619 (b-file synthesized from sequence entry) 1 1 2 5 3 13 4 29 5 60 6 118 7 225 8 419 9 767 10 1385 11 2474 12 4380 13 7697 14 13441 15 23345 16 40357 17 69480 18 119186 19 203793 20 347455 21 590851 22 1002385 23 1696918 24 2867064 25 4835425 26 8141693 27 13687765 28 22979309 29 38527572 30 64517230 31 107915649 32 180314075 33 300981767 34 501929081